How to hook up elecrical guages

I ran all VDO Visions on my Dart. I ran all new wires, as excessive resistance in old wires can cause false readings.

I agree, any kind of tap is bad mojo. Solder, tape, heat shrink :thumblef: Keep in mind there is also a second ground wire needed for JUST the lighting. Most aftermarket gauges require specific sending units.

I don't run a current gauge any more. I only run a volt gauge. To do it properly, you should run the voltage sense on an ignition switched relay, with the fed wire coming direct form the battery. This is best, since there is typically a 1-2 volt drop from the battery to the dash wiring in old cars. I just put mine on a switch, which also puts power to the other gauges.